Five novel organic push–pull dyes, DT, CD-T, TD-T, CD-C and TD-P, based on carbazole or triphenylamine as donors, dithieno[3,2-b:2′,3′-d]pyrrole as a π-spacer and cyanoacetic acid as an acceptor were synthesized, and their structures were optimized for DSSCs. Dithieno[3,2-b:2′,3′-d]pyrrole was linked with either carbazole or triphenylamine via a Suzuki coupling reaction. Followed by formylation via
基于
咔唑或
三苯胺作为供体的五种新型有机推挽
染料DT,CD-T,TD-T,CD-C和TD-P,二
噻吩并[3,2- b:2',3'- d ]合成了作为π-间隔基的
吡咯和作为受体的
氰基
乙酸,并对其结构进行了优化。二
噻吩并[3,2- b:2',3'- d ]
吡咯用或者
咔唑或
三苯胺链接经由Suzuki偶联反应。随后通过Vilsmeier-Haak反应进行甲酰化,然后使用Knoevenagel缩合反应连接
氰基
乙酸,生产出咔唑类
染料CD-C和CD-T以及基于
三苯胺的
染料TD-P和TD-T。同时,合成
染料DT作为比较的参考。咔唑类
染料CD-T和CD-C的摩尔消光系数分别为56370 M -1 cm -1和62 471 M -1 cm -1,而基于
三苯胺,TD-T和TD的
染料的摩尔消光系数为-P分别为44 555 M -1 cm -1和49 945 M -1 cm -1。优化的功率转换效率CD-T达到6.63%,开路电压为710